EP1093177A2 - Electrolyte for rechargeable lithium battery - Google Patents
Electrolyte for rechargeable lithium battery Download PDFInfo
- Publication number
- EP1093177A2 EP1093177A2 EP00121393A EP00121393A EP1093177A2 EP 1093177 A2 EP1093177 A2 EP 1093177A2 EP 00121393 A EP00121393 A EP 00121393A EP 00121393 A EP00121393 A EP 00121393A EP 1093177 A2 EP1093177 A2 EP 1093177A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrolyte
- carbonate
- organic solvent
- rechargeable lithium
- lithium battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
- H01M6/162—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte
- H01M6/168—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte by additives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to an electrolyte for a rechargeable lithium battery and more particularly, to an electrolyte for a rechargeable lithium battery with good safety characteristics.
- the rechargeable lithium battery is preferably adopted because lithium has a high standard potential as well as a low electrochemical equivalent weight.
- Safety characteristics are critical for rechargeable lithium batteries, and attempts to improve the safety characteristics have been made by modifying active materials, separators, battery systems or electrolytes.
- One approach has been to use a porous separator with a low melting point in the battery. The pores of the separator are easily blocked and lithium ions cannot pass through the pores.
- Another approach has been to design the battery to induce a short circuit when the internal pressure is raised due to gas generation.
- the carbonate-based organic solvents include cyclic carbonates such as ethylene carbonate and, propylene carbonate, linear carbonates such as dimethyl carbonate and, diethyl carbonate, and ethers such as tetrahydrofuran, ester and, ketone, or a mixture thereof.
- cyclic carbonates such as ethylene carbonate and, propylene carbonate
- linear carbonates such as dimethyl carbonate and, diethyl carbonate
- ethers such as tetrahydrofuran, ester and, ketone, or a mixture thereof.
- ethylene carbonate, propylene carbonate and ether are used.
- the carbonate-based organic solvents have safety problems.
- the problems are caused by oxygen atoms in the carbonate-based organic solvents. During charge and discharge cycles, oxygen atoms are converted into oxygen gas or peroxide, resulting in an increase in internal pressure and possible explosion of the battery.
- an electrolyte for a rechargeable lithium battery including at least one organic solvent and a lithium salt.
- the organic solvent is selected from thiocarbonate, thioester or thioether.
- the thiocarbonate, thioester or thioether is prepared by replacing oxygen atoms with sulfur atoms in carbonate, ester or ether, respectively.
- the conventional electrolyte includes a carbonate-based organic solvent and a lithium salt.
- the carbonate-based organic solvent exhibits high conductivity in the presence of suitable lithium salts.
- Oxygen atoms in the carbonate-based organic solvent are converted into oxygen gas or peroxide, which are able to increase internal pressure and explode a rechargeable lithium battery.
- An electrolyte of the present invention uses a sulfur-included organic solvent, and accordingly, the electrolyte of the present invention can prevent problems associated with oxygen atoms in organic solvents.
- the sulfur-included organic solvent is selected from thiocarbonate, thioester or thioether, and it is produced by replacing oxygen atoms with sulfur atoms in carbonate, ester and ether.
- the element sulfur belongs to 6B of the periodic table, as does oxygen.
- the sulfur atom has a larger atomic radius than that of the oxygen atom, and the larger atomic radius of the sulfur atom makes it easier to form a covalent bond between lone paired electrons of the sulfur atom and lithium ion relative to the oxygen atoms in dimethyl carbonate. This improves both the activation of lithium ions and ion conductivity.
- the electrolyte of the present invention can provide a rechargeable lithium battery exhibiting improved safety characteristics.
- Preferred thiocarbonate is dimethyl trithiocarbonate represented by formula 1.
- Trithiocarbonate of formula 1 has a melting point of -3°C, a boiling point of 101°C at 121 mmHg and a flash point (Fp) of 97°C.
- Dimethyl carbonate of the conventional electrolyte has a boiling point of 90.6°C at ambient pressure. Accordingly, the boiling point of trithiocarbonate is higher than that of dimethyl carbonate and the high melting point makes it difficult to evaporate trithiocarbonate. Furthermore, it is difficult to generate oxygen gas or peroxide in the battery, so explosions can be prevented.
- Preferred thioether is tetrahydrothiophene, which is produced by substituting sulfur atoms for oxygen atoms in tetrahydrofuran.
- the electrolyte of the present invention further may include an oxygen-included organic solvent selected from carbonate, ester or ether as used in conventional electrolytes.
- the amount of the thiocarbonate in total organic solvent is preferably 10 to 30 V% of the total electrolyte.
- the examples of the electrolyte of the present invention including the sulfur-included organic solvent and the oxygen-included organic solvent are a first mixture of dimethyl trithiocarbonate, ethylene carbonate and propylene carbonate; a second mixture of dimethyl trithiocarbonate, diethyl carbonate and ethylenemethylene carbonate; and a third mixture of dimethyl trithiocarbonate, dimethyl carbonate and diethyl carbonate.
- the lithium salt may be any lithium salts known in the related arts, and the exemplary are LiPF 6 , LiAsF 6 , LiCF 3 SO 3 , LiN(CF 3 SO 2 ) 3 , LiBF 6 , or LiClO 4 .
- Dimethyl trithiocabonate (Aldrich., Co.), ethylene carbonate and propylene carbonate were mixed in the volume ratio of 2: 4: 4. In the mixed organic solvent, 1M LiPF 6 was dissolved to produce an electrolyte.
- the positive electrode was assembled with the negative electrode and a separator (Celgard., Co.) to produce an electrode element.
- the electrolyte was added to the electrode element to fabricate a rechargeable lithium cell.
- a rechargeable lithium cell was manufactured by the same procedure in Example 1 except that dimethyl trithiocarbonate, diethyl carbonate, and ethylene methylene carbonate were mixed in the volume ratio of 2: 4: 4.
- a rechargeable lithium cell was manufactured by the same procedure in Example 1 except that dimethyl trithiocarboante, dimethyl carbonate, and diethyl carbonate were mixed in the volume ratio of 2: 4: 4.
- Fig. 1 The cycle life characteristics of the cells according to Examples 1 to 3 were measured. At this time, the charge and discharge cycles were repeated three times at 0.5C, 10 times at 1C, and 24 times at 0.5C. The results are shown in Fig. 1.
- the ⁇ line indicates the cell of Example 1 (hereinafter, referred to as "(a)”)
- the line indicates the cell of Example 2 (hereinafter, referred to as "(b)”
- the ⁇ line indicates the cell of Example 3 (hereinafter, referred to as "(c)').
- the sulfur-included organic solvent serves to facilitate the movement of lithium ions and to improve ion conductivity, and has a higher boiling point than carbonate-based organic solvent such that it is difficult to evaporate, and it generates no oxygen gas or peroxide. Accordingly, the electrolyte of the present invention can provide a rechargeable lithium battery with good safety characteristics.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
Disclosed is an electrolyte for a rechargeable lithium battery including
at least one organic solvent selected from the group consisting of thiocarbonate,
thioester and thioether, and a lithium salt.
Description
This application is based on application No. 99-44153 filed in the
Korean Industrial Property Office on October 12, 1999, the content of which is
incorporated hereinto by reference.
The present invention relates to an electrolyte for a rechargeable
lithium battery and more particularly, to an electrolyte for a rechargeable lithium
battery with good safety characteristics.
In recent years, the development of miniaturized portable electronics
provokes needs for a rechargeable battery having a high capacity as well as a
light weight. From the viewpoint of the capacity improvement per unit weight,
the rechargeable lithium battery is preferably adopted because lithium has a
high standard potential as well as a low electrochemical equivalent weight.
Safety characteristics are critical for rechargeable lithium batteries, and
attempts to improve the safety characteristics have been made by modifying
active materials, separators, battery systems or electrolytes. One approach
has been to use a porous separator with a low melting point in the battery.
The pores of the separator are easily blocked and lithium ions cannot pass
through the pores. Another approach has been to design the battery to induce
a short circuit when the internal pressure is raised due to gas generation.
Another approach is to use carbonate-based organic solvents in
electrolytes. The carbonate-based organic solvents include cyclic carbonates
such as ethylene carbonate and, propylene carbonate, linear carbonates such
as dimethyl carbonate and, diethyl carbonate, and ethers such as
tetrahydrofuran, ester and, ketone, or a mixture thereof. In particular, ethylene
carbonate, propylene carbonate and ether are used.
However, the carbonate-based organic solvents have safety problems.
The problems are caused by oxygen atoms in the carbonate-based organic
solvents. During charge and discharge cycles, oxygen atoms are converted
into oxygen gas or peroxide, resulting in an increase in internal pressure and
possible explosion of the battery.
It is an object of the present invention to provide an electrolyte for a
rechargeable lithium battery with good safety characteristics.
It is another object to provide the electrolyte for a rechargeable lithium
battery that includes sulfur atoms.
These and other objects may be achieved by an electrolyte for a
rechargeable lithium battery including at least one organic solvent and a lithium
salt. The organic solvent is selected from thiocarbonate, thioester or thioether.
The thiocarbonate, thioester or thioether is prepared by replacing oxygen atoms
with sulfur atoms in carbonate, ester or ether, respectively.
A more complete appreciation of the invention, and many of the
attendant advantages thereof, will be readily apparent as the same becomes
better understood by reference to the following detailed description when
considered in conjunction with the accompanying drawing, wherein:
The conventional electrolyte includes a carbonate-based organic
solvent and a lithium salt. The carbonate-based organic solvent exhibits high
conductivity in the presence of suitable lithium salts. However, the safety of
these solvents has been questioned. Oxygen atoms in the carbonate-based
organic solvent are converted into oxygen gas or peroxide, which are able to
increase internal pressure and explode a rechargeable lithium battery.
An electrolyte of the present invention uses a sulfur-included organic
solvent, and accordingly, the electrolyte of the present invention can prevent
problems associated with oxygen atoms in organic solvents.
The sulfur-included organic solvent is selected from thiocarbonate,
thioester or thioether, and it is produced by replacing oxygen atoms with sulfur
atoms in carbonate, ester and ether.
The element sulfur belongs to 6B of the periodic table, as does oxygen.
The sulfur atom has a larger atomic radius than that of the oxygen atom, and
the larger atomic radius of the sulfur atom makes it easier to form a covalent
bond between lone paired electrons of the sulfur atom and lithium ion relative to
the oxygen atoms in dimethyl carbonate. This improves both the activation of
lithium ions and ion conductivity.
Because the sulfur-included organic solvent includes no oxygen atoms,
which can generate gas or peroxide and increase internal pressure of the
battery, the electrolyte of the present invention can provide a rechargeable
lithium battery exhibiting improved safety characteristics.
Preferred thiocarbonate is dimethyl trithiocarbonate represented by
formula 1.
Trithiocarbonate of formula 1 has a melting point of -3°C, a boiling point
of 101°C at 121 mmHg and a flash point (Fp) of 97°C. Dimethyl carbonate of
the conventional electrolyte has a boiling point of 90.6°C at ambient pressure.
Accordingly, the boiling point of trithiocarbonate is higher than that of dimethyl
carbonate and the high melting point makes it difficult to evaporate
trithiocarbonate. Furthermore, it is difficult to generate oxygen gas or peroxide
in the battery, so explosions can be prevented.
Preferred thioether is tetrahydrothiophene, which is produced by
substituting sulfur atoms for oxygen atoms in tetrahydrofuran.
Furthermore, the electrolyte of the present invention further may include
an oxygen-included organic solvent selected from carbonate, ester or ether as
used in conventional electrolytes.
If the electrolyte including both the sulfur-included organic solvent and
the oxygen-included organic solvent is used in the rechargeable lithium battery,
the amount of the thiocarbonate in total organic solvent is preferably 10 to 30
V% of the total electrolyte.
The examples of the electrolyte of the present invention including the
sulfur-included organic solvent and the oxygen-included organic solvent are a
first mixture of dimethyl trithiocarbonate, ethylene carbonate and propylene
carbonate; a second mixture of dimethyl trithiocarbonate, diethyl carbonate and
ethylenemethylene carbonate; and a third mixture of dimethyl trithiocarbonate,
dimethyl carbonate and diethyl carbonate.
The lithium salt may be any lithium salts known in the related arts, and
the exemplary are LiPF6, LiAsF6, LiCF3SO3, LiN(CF3SO2)3, LiBF6, or LiClO4.
The following examples further illustrate the present invention.
94 wt% of LiCoO2 (Nippon chem., Co.) as a positive active material, 3
wt% of Super P as a conductive agent and 3 wt% of polyvinylidene fluoride as a
binder were dissolved in N-methylpyrrolidone as a solvent to make a slurry.
The slurry was then cast into a film shape on aluminum foil as a current
collector to produce a positive electrode. 90 wt% of mesocarbon fiber (Petoca,
Co.), 0.2 wt% of oxalic acid as an additives and 9.8 wt% of polyvinylidene
fluoride were dissolved in N-methylpyrrolidone to make a slurry. The slurry
was then cast into a film shape on a copper foil to produce a negative electrode.
Dimethyl trithiocabonate (Aldrich., Co.), ethylene carbonate and
propylene carbonate were mixed in the volume ratio of 2: 4: 4. In the mixed
organic solvent, 1M LiPF6 was dissolved to produce an electrolyte.
The positive electrode was assembled with the negative electrode and
a separator (Celgard., Co.) to produce an electrode element. The electrolyte
was added to the electrode element to fabricate a rechargeable lithium cell.
A rechargeable lithium cell was manufactured by the same procedure in
Example 1 except that dimethyl trithiocarbonate, diethyl carbonate, and
ethylene methylene carbonate were mixed in the volume ratio of 2: 4: 4.
A rechargeable lithium cell was manufactured by the same procedure in
Example 1 except that dimethyl trithiocarboante, dimethyl carbonate, and
diethyl carbonate were mixed in the volume ratio of 2: 4: 4.
The cycle life characteristics of the cells according to Examples 1 to 3
were measured. At this time, the charge and discharge cycles were repeated
three times at 0.5C, 10 times at 1C, and 24 times at 0.5C. The results are
shown in Fig. 1. In Fig. 1, the ◆ line indicates the cell of Example 1
(hereinafter, referred to as "(a)"), the 
line indicates the cell of Example 2
(hereinafter, referred to as "(b)") and the ▴ line indicates the cell of Example 3
(hereinafter, referred to as "(c)').
After repeating the charge and discharge cycles at 0.5C 10 times, all of
(a), (b) and (c) exhibited no capacity loss. Furthermore, after repeating the
charge and discharge cycles at 1C 10 times, the capacity of (a) was reduced
from 0.85Ah to 0.80Ah, that of (b) was reduced from about 0.8Ah to about
0.75Ah and that of (c) was reduced from 0.75Ah to 0.70Ah. That is, the
capacity loss was about 0.05Ah for each, or about 6.0 to 6.7%. Accordingly,
the cells of Examples 1 to 3 exhibited good cycle life characteristics. In
addition, after repeating the charge and discharge cycles at 0.5C 24 times, the
capacity loss was the same as that at 1C for 10 times. It is therefore shown
that the sulfur-included organic solvent serves to improve the cycle life
characteristics.
Furthermore, the sulfur-included organic solvent serves to facilitate the
movement of lithium ions and to improve ion conductivity, and has a higher
boiling point than carbonate-based organic solvent such that it is difficult to
evaporate, and it generates no oxygen gas or peroxide. Accordingly, the
electrolyte of the present invention can provide a rechargeable lithium battery
with good safety characteristics.
While the present invention has been described in detail with reference
to the preferred embodiments, those skilled in the art will appreciate that
various modifications and substitutions can be made thereto without departing
from the spirit and scope of the present invention as set forth in the appended
claims.
Claims (6)
- An electrolyte for a rechargeable lithium battery comprising:at least one organic solvent selected from the group consisting of thiocarbonate, thioester and thioether; anda lithium salt.
- The electrolyte of claim 1 further comprising at least one organic solvent selected from the group consisting of carbonates, esters and ethers.
- The electrolyte of claim 2 wherein the electrolyte includes dimethyl trithiocarbonate, ethylene carbonate and propylene carbonate.
- The electrolyte of claim 2 wherein the electrolyte includes dimethyl trithiocarbonate, diethyl carbonate and ethylenemethylene carbonate.
- The electrolyte of claim 2 wherein the electrolyte includes dimethyl trithiocarbonate, dimethyl carbonate and diethyl carbonate.
- The electrolyte of claim 1 wherein the organic solvent is tetrahydrothiophene.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR9944153 | 1999-10-12 | ||
| KR1019990044153A KR100346541B1 (en) | 1999-10-12 | 1999-10-12 | Electrolyte for lithium secondary battery |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1093177A2 true EP1093177A2 (en) | 2001-04-18 |
| EP1093177A3 EP1093177A3 (en) | 2001-04-25 |
| EP1093177B1 EP1093177B1 (en) | 2016-03-09 |
Family
ID=19615069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00121393.3A Expired - Lifetime EP1093177B1 (en) | 1999-10-12 | 2000-10-12 | Electrolyte for rechargeable lithium battery |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6589698B1 (en) |
| EP (1) | EP1093177B1 (en) |
| JP (1) | JP4493197B2 (en) |
| KR (1) | KR100346541B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898816A (en) * | 2015-12-17 | 2017-06-27 | 张家港市国泰华荣化工新材料有限公司 | A kind of lithium battery electrolytes and lithium battery |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100467435B1 (en) * | 2002-09-06 | 2005-01-24 | 삼성에스디아이 주식회사 | An electrolyte for a lithium battery and a lithium battery comprising the same |
| DE10318555B3 (en) * | 2003-04-24 | 2004-11-25 | Hilti Ag | Blowing agent container for setting tools and combustion-powered setting tool |
| JP4518547B2 (en) * | 2004-07-12 | 2010-08-04 | 日立マクセル株式会社 | Organic electrolyte and organic electrolyte battery |
| JP4952680B2 (en) * | 2008-08-05 | 2012-06-13 | ソニー株式会社 | Lithium ion secondary battery and negative electrode for lithium ion secondary battery |
| JP2013131395A (en) | 2011-12-21 | 2013-07-04 | Sony Corp | Secondary battery, battery pack, electric vehicle, power storage system, electric power tool, and electronic apparatus |
| JP5910066B2 (en) | 2011-12-21 | 2016-04-27 | ソニー株式会社 | Lithium ion secondary battery, battery pack, electric vehicle, power storage system, electric tool and electronic device |
| JP5935318B2 (en) | 2011-12-26 | 2016-06-15 | ソニー株式会社 | Electrolyte for lithium ion secondary battery, lithium ion secondary battery, battery pack, electric vehicle, power storage system, electric tool and electronic device |
| JP6065379B2 (en) | 2012-02-28 | 2017-01-25 | ソニー株式会社 | Lithium ion secondary battery, battery pack, electric vehicle, power storage system, electric tool and electronic device |
| JP6070236B2 (en) | 2012-02-29 | 2017-02-01 | ソニー株式会社 | Lithium ion secondary battery, battery pack, electric vehicle, power storage system, electric tool and electronic device |
| JP2013222582A (en) | 2012-04-16 | 2013-10-28 | Sony Corp | Secondary battery, battery pack, electric vehicle, power storage system, power tool, and electronic equipment |
| KR101809651B1 (en) * | 2012-11-23 | 2017-12-15 | 주식회사 엘지화학 | Electrolyte Solution for Lithium Secondary Battery and Lithium Secondary Battery Comprising The Same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4489145A (en) | 1983-10-18 | 1984-12-18 | Abraham Kuzhikalail M | Lithium battery |
| JPS61147475A (en) | 1984-12-19 | 1986-07-05 | Showa Denko Kk | Secondary battery |
| JP3046972B2 (en) | 1990-11-30 | 2000-05-29 | 株式会社リコー | Non-aqueous electrolyte and battery containing the same |
| JPH04277469A (en) * | 1991-03-01 | 1992-10-02 | Ricoh Co Ltd | Non-aqueous electrolyte and batteries containing it |
| US5686138A (en) | 1991-11-12 | 1997-11-11 | Sanyo Electric Co., Ltd. | Lithium secondary battery |
| CA2205683C (en) | 1997-05-16 | 2001-05-15 | Moli Energy (1990) Limited | Polymerizable additives for making non-aqueous rechargeable lithium batteries safe after overcharge |
| JP3443279B2 (en) | 1997-06-02 | 2003-09-02 | 三洋電機株式会社 | Lithium battery |
| EP1042838A4 (en) | 1997-12-02 | 2001-04-04 | Stanford Res Inst Int | BATTERY ELECTROLYTES PRODUCING FLAME RETARDANT GAS |
| JP4134414B2 (en) * | 1998-12-25 | 2008-08-20 | 宇部興産株式会社 | Electrolyte for lithium secondary battery and lithium secondary battery using the same |
| KR100303543B1 (en) | 1999-05-03 | 2001-09-26 | 김순택 | A non-flammable electrolyte and a lithium secondary battery made thereof |
-
1999
- 1999-10-12 KR KR1019990044153A patent/KR100346541B1/en not_active Expired - Lifetime
-
2000
- 2000-10-11 US US09/689,152 patent/US6589698B1/en not_active Expired - Lifetime
- 2000-10-12 JP JP2000311966A patent/JP4493197B2/en not_active Expired - Lifetime
- 2000-10-12 EP EP00121393.3A patent/EP1093177B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898816A (en) * | 2015-12-17 | 2017-06-27 | 张家港市国泰华荣化工新材料有限公司 | A kind of lithium battery electrolytes and lithium battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001135351A (en) | 2001-05-18 |
| EP1093177A3 (en) | 2001-04-25 |
| KR100346541B1 (en) | 2002-07-26 |
| JP4493197B2 (en) | 2010-06-30 |
| US6589698B1 (en) | 2003-07-08 |
| KR20010036946A (en) | 2001-05-07 |
| EP1093177B1 (en) | 2016-03-09 |
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